They used a good cop/bad cop routine. Room A was very harsh. Combative even. Creating silence, and asking questions that simply create conflict. I was the team leader on a project, and when asked "who is the most important person on the team" I said "we were all important", he followed up with "why wasn't it you?" and "how do we get your friend's resumes". Room B was very friendly. I didn't get the offer. To prepare for this, I would practice how to work with interrogations.